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How to implement verification code countdown in JS

亚连

Jun 14, 2018 am 10:51 AM

This article will share with you an example code that starts the 60S countdown function after sending the verification code. Please refer to this article for the specific example code

Prototype Picture

Requirement: Mobile phone number verification

After sending the verification code, the 60S countdown will begin

If you do not fill in the verification code after 60s, you can resend it

<!doctype html>
<html>
   <head>
      <meta charset="utf-8">
      <title>注册</title>
      <meta http-equiv="X-UA-Compatible" content="IE=edge">
      <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
      <meta name="format-detection" content="telephone=no">
      <meta name="renderer" content="webkit">
      <meta http-equiv="Cache-Control" content="no-siteapp" />
      <script src="http://code.jquery.com/jquery-latest.js";></script>
   </head>
   <body>
      <input type="text" id="phone" class="am-form-field my-radius" placeholder="请输入手机号" >
      <p style="height:2rem;">
         <font id="errMsg1" color="red" ></font>
      </p>
      <p>
         <input id="rpcode" type="text" placeholder="请输入验证码">
         <input id="getCode" type="button" value="获取验证码" onclick="sendMessages()"></input>
         <font id="errMsg2" color="red" style="display:none; position:absolution; top:2rem;"></font>
      </p>
      <p id="start">
         <span>开始</span>
      </p>
      <!-- 保存验证码 -->
      <input type="text" id="code" hidden="true">
      <script>
         var InterValObj; //timer变量，控制时间 
         var count = 60; //间隔函数，1秒执行 
         var curCount; //当前剩余秒数 
         var code = ""; //验证码 
         var codeLength = 6; //验证码长度 
         function sendMessages() {
            curCount = count;
            var phone = $("#phone").val()
            if(validatePhone(phone)) {
               return;
            }
            if(phone != "") {
               //设置button效果，开始计时 
               $("#getCode").attr("disabled", "true");
               $("#getCode").val("请在" + curCount + "秒内输入");
               InterValObj = window.setInterval(SetRemainTimes, 1000); //启动计时器，1秒执行一次 
               //向后台发送处理数据 
               $.ajax({
                  url: "getCode.action",
                  dataType: "json",
                  type: "get",
                  data: "phone=" + phone,
                  success: function(data) {
                     //保存验证码
                     $("#code").val(data);
                  }
               });
            } else {
               alert("手机号码不能为空！！！！！！");
            }
         }
         //timer处理函数 
         function SetRemainTimes() {
            if(curCount == 0) {
               window.clearInterval(InterValObj); //停止计时器 
               $("#getCode").removeAttr("disabled"); //启用按钮 
               $("#getCode").val("重新发送验证码");
               code = ""; //清除验证码。如果不清除，过时间后，输入收到的验证码依然有效   
            } else {
               curCount--;
               $("#getCode").val("请在" + curCount + "秒内输入");
            }
         }
         //开始按钮点击事件
         $("#start").click(function() {
            window.location.href = "regafter.html?phone=" + $("#phone").val();
         })
         //验证手机号
         function validatePhone(phone) {
            if(phone == &#39;&#39;) {
               $("#errMsg1").html("  请先填写手机号");
               $("#errMsg1").show();
               return true;
            }
            var myreg = /^(((13[0-9]{1})|(15[0-9]{1})|(18[0-9]{1}))+\d{8})$/;
            if(!myreg.test(phone)) {
               $("#errMsg1").html("  请输入有效的手机号");
               $("#errMsg1").show();
               return true;
            }
            return false;
         }
         //验证码非空和错误验证
         function validateCode() {
            var phone = $("#phone").val();
            var code = $("#code").val();
            var rpcode = $("#rpcode").val();
            if(validatePhone(phone)) {
               return true;
            }
            if(code == &#39;&#39;) {
               $("#errMsg2").html("  请先获取验证码");
               $("#errMsg2").show();
               return true;
            }
            if(rpcode == &#39;&#39; || code != rpcode) {
               $("#errMsg2").html("  请正确输入验证码");
               $("#errMsg2").show();
               return true;
            }
            alert(code != rpcode);
            return false;
         }
         $("#phone").on("focus", function() {
            $("#errMsg1").hide();
         })
         $("#rpcode").on("focus", function() {
            $("#errMsg2").hide();
         })
      </script>
   </body>
</html>

above I compiled it for everyone. I hope it will be helpful to everyone in the future.

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